Perhaps you should try some spelling variations:
"maternal nutrition" » "material nutrition", "materials nutrition", "materia nutrition", "materiall nutrition"
"maternal nutritivo" » "material nutritivo", "materials nutritivo", "materia nutritivo", "materiall nutritivo"
"materna nutritiva" » "materia nutritiva", "material nutritiva"
"materna nutricion" » "materia nutricion", "material nutricion"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("maternal nutrition") OR ("maternal nutritivo"))) OR ((("materna nutritiva") OR ("materna nutricion"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"maternal nutrition\") OR (\"maternal nutritivo\"))) OR (((\"materna nutritiva\") OR (\"materna nutricion\"))))".
• Removing quotes may allow a broader search: (((( maternal nutrition ) OR ( maternal nutritivo ))) OR ((( materna nutritiva ) OR ( materna nutricion )))).
• Adding a wildcard symbol may retrieve word variants: (((("maternal nutrition") OR ("maternal nutritivo"))) OR ((("materna nutritiva") OR ("materna nutricion"))))*.